In 1985, a 0.5-mm cell was discovered in surgeonfish and namedEpulopiscium fishelsoni. It was presumedto be a protozoan. In 1993, researchers determined thatEpulopiscium was actually a gram-positive bacterium.Why do yousuppose this organism was initially identified as a protozoan?What evidence would change the classification to bacterium?

I don't know would it be the shape and whether it shows up to be gram positive in a test?